CHUCK UNIT FOR AUTOMATIC MACHINE TOOLS, DESIGNED TO PERFORM BOTH POWER TASKS AND FINISHING WORK

摘要

This invention relates to a chuck unit for automatic machine tools, designed to perform both power tasks and high-speed finishing of pieces, with lubricant/coolant fluid flowing through the chuck shaft, which includes : .cndot. a support (1) on which a chuck (4) for a power tool is mounted, the said chuck being driven by a first motor (2) .cndot. a second chuck (5) mounted inside the previous one and coaxial with it, which is driven by a second independent motor (18), .cndot. means (12) designed to discharge the pull of the power tool (4) onto the said support being fitted. The result is a unit which can receive different types of tool and perform different types of task, for which it has so far been most advantageous to use two separate machines.